Electrically-heated implement.



5.5.5085. ELECTRICALLY HEATED IMPLEMENT.

APPLICATION FILED JULY 17. I912.

1,158,557. Patented Nov. 2, 1915.

WITNESSES: m NYTOR ATTORNEY UNITED STATES PATENT OFFICE.

EDWARD ROSE, 0E swIssvALE, PENNSYLVANIA, ASSIGNOR To WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION 01? PENNSYL- VANIA.

ELECTRICALLY-HEATED IMPLEMENT.

Specification of Letters Patent.

Patented Nov. 2, 1 915.

Application filed July 17, 1912. Serial No. 710,039.

- cally-Heated Implements, of which thefollowing is a specification.

My invention relates to electrically heated implements, such as sad irons or similar devices, and it has for one of its objects to provide a device of this general class which shall be simple, durable and inexpensive in construction, and efiective and eflicient in Operation. 1 Another object of my invention is to provide a device of the above-indicated character which shall be so constructed that it may be quickly brought up to its working temperature, and that the heat generated in its heating element may be readily and efficiently transmitted to the working surface of the implement when in use and may be stored or accumulated in a suitable heatstorage member during the intervals in which it is idle, whereby, the heat thus ac-- cumulated may be utilized as desired.

In the prior art, it has been customary to dispose the heater unit between a body memher and a relatively large working member. Much inconvenience and difii culty has been experienced with sad irons of this type for the reason that a considerable period of time is required to raise the temperature of the Working member to a sufficient degree to permit of the proper use of the device, and, furthermore, the transfer; of heat through this bulky working member has been slugish. iAccording to my present invention, I provide'an electrically heated sadiron which embodies a heater unit that is assembled between body member of good heat-storage material and a relatively thin plate of good heat-conducting material, whereby the diiii- 'cult'ies hereinbefore mentioned are over- ..come.

My invention may be best understood by reference to the accompanying drawing in which- Figure 1 is a view, partially in side elevation and partially in section, of a device constructed in accordance with my invention, and Fig. 2 is a bottom plan view of the device shown in Fig. 1 with a portion of the parts removed for the sake of clearness.

Referring to the drawing, the device here shown comprises a heater unit 1, a body member 2, a plate or working member 3, a shell 4.- and a handle 5.

The heater unit 1 may be of any wellknown construction, although I prefer to employ a resistance ribbon 6 that is slotted alternately from opposite sides to form a zig-zag path of increased resistance for the current, said ribbon being. wound in the form of a flattened helix upon a notched insulating plate 7. Inasmuch as the structural details of the heater unit 1 form no material part of my present invention, I deem it unnecessary to describe the same further, it being understood that any suitable electrical heater for accomplishing the same result may be employed.

The body member 2 is preferably constructed of good heat-storage material such as cast iron, and is provided with an enlarged upper portion 8 that is adapted to increase the heat-storage capacity of the member. Furthermore, the body member 2 is provided with a shallow bottom recess 9 that covers substantially all of the bottom surface thereof, and is substantially similar in contour to the outline of the body mem ber itself.

The heater unit ,1 is disposed within the recess 9 and in intimate contact with the body member 2, it being understood that the resistance ribbon 6 is suitably insulated therefrom. The thin plate 3 is of good heat-conducting material and of such shape as to fit tightly into the recess 9 and in intimate contact with the heater unit 1. The plate 3 may be secured in position in any suitable manner, although I prefer that the edges thereof be welded or similarly united to the inner edges of the recessed body memher 2 in order that a perfectly smooth bottom working surface may be provided.

' The shell 4: may be punched from sheet material or may be cast, as desired, and is fitted tightly over the upper portion of the body member 2 and secured thereto by means of abolt 10. By reason of the construction of the shell 4, an air space 11 is provided around the upper portion of the body member 2, whereby the free radiation of heat therefrom is prevented. The handle 5 may be of any desired construction and is supported upon a plurality of bracket members 12 that are suitably attached to the shell 4.

In the operation of the device, when elec-' bottom plate 3 of good heat-conducting material to the working surface of the implement, and, hence, the iron may be utilized very soon after the energy is turned on. By reason of the small amount of material in the bottom plate 3-, and the high thermal conductivity thereof, it is evident that the' required heat is effectively and efliciently transferred to the working surface. During the intervals in which the iron is not in use, the heat generated in the electric heaterl 'is stored or accumulated in the body member 2 from which it may be drawn for future use.

Those skilled in the art will readily understand'that implements having structural details and arrangement and location of parts that differ in certain respects from those hereinbefore shownv and described may be employed and may secure the benefits and advantages of my invention, and I desire that such modifications as do not depart from the spirit and scope of my invention may be included in. the appended claims.

I claim as my invention". v

1. An electrically heated sad iron comprising a body member having a shallow bottom recess, an electric heater disposed in said recsss and in intimate contact with said body member, and arelatively thin bottom plate disposed adjacent to said heater and intimately secured to said body member to form a smooth and continuous working body 2. An electrically heated sad iron com prising a body member having a shallow bottom recess therein. an electric heaterdis posed in said recess and in intimate contact with such body member. and a relatively thin bottom plate disposed in said recess and intimately secured to the edges thereof to iorm a smooth and continuous working surace.

3. An electrically heated sad iron comprising a body member of good heat-storage material having a shallow bottom recess covering substantially all of the bottom surface, an electric heater disposed within said recess and in intimate contact with said body member, and a thin plate of good heat-conducting material fitted tightly within said recess and in intimate contact with said heater, the edges of said plate being welded or similarlv united to the edges of said recessed member to form a smooth working surface.

4. An electrically heated sad iron comprising a body memoer having an enlarged portion adapted to store heat. and a shallow bottom recess, a shell enveloping the enlarged portion of said body member and providing an air space around the same, an electric heater disposed in said, bottom recess, and a plate of good heat-conducting material disposed beneath said heater and constituting the working surface of said iron.

In testimony whereof, I have hereunto subscribed my name this 26th day of June,

EDWARD E. ROSE. Witnesses:

HERBERT E. RUeeLns, B. l3. IIINES. 

